/*
 * Copyright (c) 2011 Sapienza University of Rome.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the
 *   distribution.
 * - Neither the name of the Sapienza University of Rome nor the names of
 *   its contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL SAPIENZA
 * UNIVERSITY OF ROME OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * @author Ugo Colesanti <colesanti@dis.uniroma1.it>
 * @version 1.00 (September 28, 2011)
 *
 */

/**
 * This interface is provided by the ManagerC component of DISSense.
 * It's goal is to enable an application to easily schedule the sampling phase:
 * In order to give a fresh sample, the application should run the sampling
 * task (and send the packet) just before the beginning of an active phase of DISSense.
 * By calling a setSamplingOffset(time t) we ask the ManagerC component to signal a startSampling()
 * event t milliseconds before the active phase of DISSense begins.
 *
 */
interface DISSenseSampling{

	/**
	 * Notifies the component (e.g., application) that uses the DISSenseSampling interface, to start a sampling task.
	 * As mentioned in the introduction, this event is scheduled based on the time we set by calling the setSamplingOffset command.
	 */
	event void startSampling() ;

	/**
	 * Schedule a startSampling event offset_time milliseconds before the beginning of an active phase of DISSense.
	 * @param offset_time The offset value (milliseconds).
	 */
	command void setSamplingOffset(uint32_t offset_time) ;
}
